Broken mitochondria use 'eat me' proteins to summon their executioners

… "We see that the mutant fish lacking adequate functional NIPSNAP1 are not able to move as the wild-type fish," says Simonsen. They have a Parkinsonian-like phenotype with reduced numbers of dopaminergic neurons. However, they could rescue this locomotion defect by adding L-dopa, the same compound used to treat human Parkinson's Disease, to the water.
Even more dramatically, animals entirely lacking NIPSNAP1 protein died within five days. "Clearly, clearance of mitochondria is important for the health of these dopaminergic neurons. That is particularly important since neurons generally cannot divide," says Johansen.
As evolutionarily conserved proteins, NIPSNAP proteins are found throughout the animal kingdom, including humans.

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